CB - Kostas Manolas.
DM - Lassana Diarra.
CM - Andre Gomes
RW - Henrikh Mkhitaryan.
ST - Zlatan Ibrahimovic
This is a solid and realistic list, with the possible exception of Mkhitaryan leaving and not getting CL football (though if Pep doesn't think he's winger-y enough, only Juventus as a Pogba replacement or Arsenal at RW come to mind as better options, and maybe he loves Mourinho or something).
We'd be solid like this. I'm assuming Mata and Fellaini go as per the rumours, but Blind stays.
----------Ibra------------ (Rashford)
Martial-------Mkhitaryian (Memphis, Young)
---Rooney---Herrera----- (Gomes, Schweinsteiger)
--------Diarra------------ (Schneiderlin)
Shaw------------Darmian (Rojo, Valencia)
---Manolas-Smalling---- (Blind, Jones)
--------De Gea---------- (Romero)
and Fosu-Mensah getting time at basically every defensive position or going on loan somewhere we think he can start every game.
Then in the summer of 2017:
-Rooney goes and replaced by a younger CM/10, perhaps Isco or James from Madrid since I don't think Zidane is going to accommodate them, or maybe Pogba can be gotten then with us back in the CL and looking strong under Mourinho.
-Ibra gets a final year extension before being replaced in 2018 as he moves to China or MLS
-Probably a new winger is brought in since either Memphis or Young has gotten the available wide starts and the other has been frozen out.